/**

 @Name：layui.layedit 富文本编辑器
 @Author：贤心
 @License：MIT

 */

layui.define(['layer', 'form'], function(exports){
    "use strict";

    var $ = layui.$
        ,layer = layui.layer
        ,form = layui.form
        ,hint = layui.hint()
        ,device = layui.device()

        ,MOD_NAME = 'layeditV2', THIS = 'layui-this', SHOW = 'layui-show', ABLED = 'layui-disabled'

        ,Edit = function(){
        var that = this;
        that.index = 0;

        //全局配置
        that.config = {
            //默认工具bar
            tool: [
                'strong', 'italic', 'underline', 'del'
                ,'|'
                ,'left', 'center', 'right'
                ,'|'
                ,'link', 'unlink', 'face', 'image', 'code', 'html', 'help'
            ]
            ,hideTool: []
            ,height: 280 //默认高
        };
    };

    //全局设置
    Edit.prototype.set = function(options){
        var that = this;
        $.extend(true, that.config, options);
        return that;
    };

    //事件监听
    Edit.prototype.on = function(events, callback){
        return layui.onevent(MOD_NAME, events, callback);
    };

    //建立编辑器
    Edit.prototype.build = function(id, settings){
        settings = settings || {};

        var that = this
            ,config = that.config
            ,ELEM = 'layui-layedit', textArea = $(typeof(id)=='string'?'#'+id:id)
            ,name =  'LAY_layedit_'+ (++that.index)
            ,haveBuild = textArea.next('.'+ELEM)

            ,set = $.extend({}, config, settings)

            ,tool = function(){
            var node = [], hideTools = {};
            layui.each(set.hideTool, function(_, item){
                hideTools[item] = true;
            });
            layui.each(set.tool, function(_, item){
                if(tools[item] && !hideTools[item]){
                    node.push(tools[item]);
                }
            });
            return node.join('');
        }()


            ,editor = $(['<div class="'+ ELEM +'">'
            ,'<div class="layui-unselect layui-layedit-tool">'+ tool +'</div>'
            ,'<div class="layui-layedit-iframe">'
            ,'<iframe id="'+ name +'" name="'+ name +'" textarea="'+ id +'" frameborder="0"></iframe>'
            ,'</div>'
            ,'</div>'].join(''))

        //编辑器不兼容ie8以下
        if(device.ie && device.ie < 8){
            return textArea.removeClass('layui-hide').addClass(SHOW);
        }

        haveBuild[0] && (haveBuild.remove());

        setIframe.call(that, editor, textArea[0], set)
        textArea.addClass('layui-hide').before(editor);

        return that.index;
    };

    //获得编辑器中内容
    Edit.prototype.getContent = function(index){
        var iframeWin = getWin(index);
        if(!iframeWin[0]) return;
        return toLower(iframeWin[0].document.body.innerHTML);
    };

    //获得编辑器中纯文本内容
    Edit.prototype.getText = function(index){
        var iframeWin = getWin(index);
        if(!iframeWin[0]) return;
        return $(iframeWin[0].document.body).text();
    };
    /**
     * 设置编辑器内容
     * @param {[type]} index   编辑器索引
     * @param {[type]} content 要设置的内容
     * @param {[type]} flag    是否追加模式
     */
    Edit.prototype.setContent = function(index, content, flag){
        var iframeWin = getWin(index);
        if(!iframeWin[0]) return;
        if(flag){
            $(iframeWin[0].document.body).append(content)
        }else{
            $(iframeWin[0].document.body).html(content)
        };
        //layedit.sync(index)
    };
    //将编辑器内容同步到textarea（一般用于异步提交时）
    Edit.prototype.sync = function(index){
        var iframeWin = getWin(index);
        if(!iframeWin[0]) return;
        var textarea = $('#'+iframeWin[1].attr('textarea'));
        textarea.val(toLower(iframeWin[0].document.body.innerHTML));
    };

    //获取编辑器选中内容
    Edit.prototype.getSelection = function(index){
        var iframeWin = getWin(index);
        if(!iframeWin[0]) return;
        var range = Range(iframeWin[0].document);
        return document.selection ? range.text : range.toString();
    };

    //iframe初始化
    var setIframe = function(editor, textArea, set){
            var that = this, iframe = editor.find('iframe');

            iframe.css({
                height: set.height
            }).on('load', function(){
                var conts = iframe.contents()
                    ,iframeWin = iframe.prop('contentWindow')
                    ,head = conts.find('head')
                    ,style = $(['<style>'
                    ,'*{margin: 0; padding: 0;}'
                    ,'body{padding: 10px; line-height: 20px; overflow-x: hidden; word-wrap: break-word; font: 14px Helvetica Neue,Helvetica,PingFang SC,Microsoft YaHei,Tahoma,Arial,sans-serif; -webkit-box-sizing: border-box !important; -moz-box-sizing: border-box !important; box-sizing: border-box !important;}'
                    ,'a{color:#01AAED; text-decoration:none;}a:hover{color:#c00}'
                    ,'p{margin-bottom: 10px;}'
                    ,'img{display: inline-block; border: none; vertical-align: middle;}'
                    ,'pre{margin: 10px 0; padding: 10px; line-height: 20px; border: 1px solid #ddd; border-left-width: 6px; background-color: #F2F2F2; color: #333; font-family: Courier New; font-size: 12px;}'
                    ,'</style>'].join(''))
                    ,body = conts.find('body');

                head.append(style);
                body.attr('contenteditable', 'true').css({
                    'min-height': set.height
                }).html(textArea.value||'');

                hotkey.apply(that, [iframeWin, iframe, textArea, set]); //快捷键处理
                toolActive.call(that, iframeWin, editor, set); //触发工具

            });
        }

        //获得iframe窗口对象
        ,getWin = function(index){
            var iframe = $('#LAY_layedit_'+ index)
                ,iframeWin = iframe.prop('contentWindow');
            return [iframeWin, iframe];
        }

        //IE8下将标签处理成小写
        ,toLower = function(html){
            if(device.ie == 8){
                html = html.replace(/<.+>/g, function(str){
                    return str.toLowerCase();
                });
            }
            return html;
        }

        //快捷键处理
        ,hotkey = function(iframeWin, iframe, textArea, set){
            var iframeDOM = iframeWin.document, body = $(iframeDOM.body);
            body.on('keydown', function(e){
                var keycode = e.keyCode;
                //处理回车
                if(keycode === 13){
                    var range = Range(iframeDOM);
                    var container = getContainer(range)
                        ,parentNode = container.parentNode;

                    if(parentNode.tagName.toLowerCase() === 'pre'){
                        if(e.shiftKey) return
                        layer.msg('请暂时用shift+enter');
                        return false;
                    }
                    iframeDOM.execCommand('formatBlock', false, '<p>');
                }
            });

            //给textarea同步内容
            $(textArea).parents('form').on('submit', function(){
                var html = body.html();
                //IE8下将标签处理成小写
                if(device.ie == 8){
                    html = html.replace(/<.+>/g, function(str){
                        return str.toLowerCase();
                    });
                }
                textArea.value = html;
            });

            //处理粘贴
            body.on('paste', function(e){
                iframeDOM.execCommand('formatBlock', false, '<p>');
                setTimeout(function(){
                    filter.call(iframeWin, body);
                    textArea.value = body.html();
                }, 100);
            });
        }

        //标签过滤
        ,filter = function(body){
            var iframeWin = this
                ,iframeDOM = iframeWin.document;

            //清除影响版面的css属性
            body.find('*[style]').each(function(){
                var textAlign = this.style.textAlign;
                this.removeAttribute('style');
                $(this).css({
                    'text-align': textAlign || ''
                })
            });

            //修饰表格
            body.find('table').addClass('layui-table');

            //移除不安全的标签
            body.find('script,link').remove();
        }

        //Range对象兼容性处理
        ,Range = function(iframeDOM){
            return iframeDOM.selection
                ? iframeDOM.selection.createRange()
                : iframeDOM.getSelection().getRangeAt(0);
        }

        //当前Range对象的endContainer兼容性处理
        ,getContainer = function(range){
            return range.endContainer || range.parentElement().childNodes[0]
        }

        //在选区插入内联元素
        ,insertInline = function(tagName, attr, range){
            var iframeDOM = this.document
                ,elem = document.createElement(tagName)
            for(var key in attr){
                elem.setAttribute(key, attr[key]);
            }
            elem.removeAttribute('text');

            if(iframeDOM.selection){ //IE
                var text = range.text || attr.text;
                if(tagName === 'a' && !text) return;
                if(text){
                    elem.innerHTML = text;
                }
                range.pasteHTML($(elem).prop('outerHTML'));
                range.select();
            } else { //非IE
                var text = range.toString() || attr.text;
                if(tagName === 'a' && !text) return;
                if(text){
                    elem.innerHTML = text;
                }
                range.deleteContents();
                range.insertNode(elem);
            }
        }

        //工具选中
        ,toolCheck = function(tools, othis){
            var iframeDOM = this.document
                ,CHECK = 'layedit-tool-active'
                ,container = getContainer(Range(iframeDOM))
                ,item = function(type){
                return tools.find('.layedit-tool-'+type)
            }

            if(othis){
                othis[othis.hasClass(CHECK) ? 'removeClass' : 'addClass'](CHECK);
            }

            tools.find('>i').removeClass(CHECK);
            item('unlink').addClass(ABLED);

            $(container).parents().each(function(){
                var tagName = this.tagName.toLowerCase()
                    ,textAlign = this.style.textAlign;

                //文字
                if(tagName === 'b' || tagName === 'strong'){
                    item('b').addClass(CHECK)
                }
                if(tagName === 'i' || tagName === 'em'){
                    item('i').addClass(CHECK)
                }
                if(tagName === 'u'){
                    item('u').addClass(CHECK)
                }
                if(tagName === 'strike'){
                    item('d').addClass(CHECK)
                }

                //对齐
                if(tagName === 'p'){
                    if(textAlign === 'center'){
                        item('center').addClass(CHECK);
                    } else if(textAlign === 'right'){
                        item('right').addClass(CHECK);
                    } else {
                        item('left').addClass(CHECK);
                    }
                }

                //超链接
                if(tagName === 'a'){
                    item('link').addClass(CHECK);
                    item('unlink').removeClass(ABLED);
                }
            });
        }

        //触发工具
        ,toolActive = function(iframeWin, editor, set){
            var iframeDOM = iframeWin.document
                ,body = $(iframeDOM.body)
                ,toolEvent = {
                //超链接
                link: function(range){
                    var container = getContainer(range)
                        ,parentNode = $(container).parent();

                    link.call(body, {
                        href: parentNode.attr('href')
                        ,target: parentNode.attr('target')
                    }, function(field){
                        var parent = parentNode[0];
                        if(parent.tagName === 'A'){
                            parent.href = field.url;
                        } else {
                            insertInline.call(iframeWin, 'a', {
                                target: field.target
                                ,href: field.url
                                ,text: field.url
                            }, range);
                        }
                    });
                }
                //清除超链接
                ,unlink: function(range){
                    iframeDOM.execCommand('unlink');
                }
                //表情
                ,face: function(range){
                    face.call(this, function(img){
                        insertInline.call(iframeWin, 'img', {
                            src: img.src
                            ,alt: img.alt
                        }, range);
                    });
                }
                //图片
                ,image: function(range){
                    var that = this;
                    layui.use('upload', function(upload){
                        var uploadImage = set.uploadImage || {};
                        upload.render({
                            url: uploadImage.url
                            ,method: uploadImage.type
                            ,elem: $(that).find('input')[0]
                            ,done: function(res){
                                if(res.code == 0){
                                    res.data = res.data || {};
                                    insertInline.call(iframeWin, 'img', {
                                        src: res.data.src
                                        ,alt: res.data.title
                                    }, range);
                                } else {
                                    layer.msg(res.msg||'上传失败');
                                }
                            }
                        });
                    });
                }
                //插入代码
                ,code: function(range){
                    code.call(body, function(pre){
                        insertInline.call(iframeWin, 'pre', {
                            text: pre.code
                            ,'lay-lang': pre.lang
                        }, range);
                    });
                }
                //帮助
                ,help: function(){
                    layer.open({
                        type: 2
                        ,title: '帮助'
                        ,area: ['960px', '540px']
                        ,shadeClose: true
                        ,shade: 0.1
                        ,skin: 'layui-layer-msg'
                        ,content: ['http://www.layui.com', 'no']
                    });
                }
            }
                ,tools = editor.find('.layui-layedit-tool')

                ,click = function(){
                var othis = $(this)
                    ,events = othis.attr('layedit-event')
                    ,command = othis.attr('lay-command');

                if(othis.hasClass(ABLED)) return;

                body.focus();

                var range = Range(iframeDOM)
                    ,container = range.commonAncestorContainer

                if(command){
                    iframeDOM.execCommand(command);
                    if(/justifyLeft|justifyCenter|justifyRight/.test(command)){
                        iframeDOM.execCommand('formatBlock', false, '<p>');
                    }
                    setTimeout(function(){
                        body.focus();
                    }, 10);
                } else {
                    toolEvent[events] && toolEvent[events].call(this, range);
                }
                toolCheck.call(iframeWin, tools, othis);
            }

                ,isClick = /image/

            tools.find('>i').on('mousedown', function(){
                var othis = $(this)
                    ,events = othis.attr('layedit-event');
                if(isClick.test(events)) return;
                click.call(this)
            }).on('click', function(){
                var othis = $(this)
                    ,events = othis.attr('layedit-event');
                if(!isClick.test(events)) return;
                click.call(this)
            });

            //触发内容区域
            body.on('click', function(){
                toolCheck.call(iframeWin, tools);
                layer.close(face.index);
            });
        }

        //超链接面板
        ,link = function(options, callback){
            var body = this, index = layer.open({
                type: 1
                ,id: 'LAY_layedit_link'
                ,area: '350px'
                ,shade: 0.05
                ,shadeClose: true
                ,moveType: 1
                ,title: '超链接'
                ,skin: 'layui-layer-msg'
                ,content: ['<ul class="layui-form" style="margin: 15px;">'
                    ,'<li class="layui-form-item">'
                    ,'<label class="layui-form-label" style="width: 60px;">URL</label>'
                    ,'<div class="layui-input-block" style="margin-left: 90px">'
                    ,'<input name="url" lay-verify="url" value="'+ (options.href||'') +'" autofocus="true" autocomplete="off" class="layui-input">'
                    ,'</div>'
                    ,'</li>'
                    ,'<li class="layui-form-item">'
                    ,'<label class="layui-form-label" style="width: 60px;">打开方式</label>'
                    ,'<div class="layui-input-block" style="margin-left: 90px">'
                    ,'<input type="radio" name="target" value="_self" class="layui-input" title="当前窗口"'
                    + ((options.target==='_self' || !options.target) ? 'checked' : '') +'>'
                    ,'<input type="radio" name="target" value="_blank" class="layui-input" title="新窗口" '
                    + (options.target==='_blank' ? 'checked' : '') +'>'
                    ,'</div>'
                    ,'</li>'
                    ,'<li class="layui-form-item" style="text-align: center;">'
                    ,'<button type="button" lay-submit lay-filter="layedit-link-yes" class="layui-btn"> 确定 </button>'
                    ,'<button style="margin-left: 20px;" type="button" class="layui-btn layui-btn-primary"> 取消 </button>'
                    ,'</li>'
                    ,'</ul>'].join('')
                ,success: function(layero, index){
                    var eventFilter = 'submit(layedit-link-yes)';
                    form.render('radio');
                    layero.find('.layui-btn-primary').on('click', function(){
                        layer.close(index);
                        body.focus();
                    });
                    form.on(eventFilter, function(data){
                        layer.close(link.index);
                        callback && callback(data.field);
                    });
                }
            });
            link.index = index;
        }

        //表情面板
        ,face = function(callback){
            //表情库
            var faces = function(){
                var alt = ["[微笑]", "[嘻嘻]", "[哈哈]", "[可爱]", "[可怜]", "[挖鼻]", "[吃惊]", "[害羞]", "[挤眼]", "[闭嘴]", "[鄙视]", "[爱你]", "[泪]", "[偷笑]", "[亲亲]", "[生病]", "[太开心]", "[白眼]", "[右哼哼]", "[左哼哼]", "[嘘]", "[衰]", "[委屈]", "[吐]", "[哈欠]", "[抱抱]", "[怒]", "[疑问]", "[馋嘴]", "[拜拜]", "[思考]", "[汗]", "[困]", "[睡]", "[钱]", "[失望]", "[酷]", "[色]", "[哼]", "[鼓掌]", "[晕]", "[悲伤]", "[抓狂]", "[黑线]", "[阴险]", "[怒骂]", "[互粉]", "[心]", "[伤心]", "[猪头]", "[熊猫]", "[兔子]", "[ok]", "[耶]", "[good]", "[NO]", "[赞]", "[来]", "[弱]", "[草泥马]", "[神马]", "[囧]", "[浮云]", "[给力]", "[围观]", "[威武]", "[奥特曼]", "[礼物]", "[钟]", "[话筒]", "[蜡烛]", "[蛋糕]"], arr = {};
                layui.each(alt, function(index, item){
                    arr[item] = layui.cache.dir + 'images/face/'+ index + '.gif';
                });
                return arr;
            }();
            face.hide = face.hide || function(e){
                if($(e.target).attr('layedit-event') !== 'face'){
                    layer.close(face.index);
                }
            }
            return face.index = layer.tips(function(){
                var content = [];
                layui.each(faces, function(key, item){
                    content.push('<li title="'+ key +'"><img src="'+ item +'" alt="'+ key +'"></li>');
                });
                return '<ul class="layui-clear">' + content.join('') + '</ul>';
            }(), this, {
                tips: 1
                ,time: 0
                ,skin: 'layui-box layui-util-face'
                ,maxWidth: 500
                ,success: function(layero, index){
                    layero.css({
                        marginTop: -4
                        ,marginLeft: -10
                    }).find('.layui-clear>li').on('click', function(){
                        callback && callback({
                            src: faces[this.title]
                            ,alt: this.title
                        });
                        layer.close(index);
                    });
                    $(document).off('click', face.hide).on('click', face.hide);
                }
            });
        }

        //插入代码面板
        ,code = function(callback){
            var body = this, index = layer.open({
                type: 1
                ,id: 'LAY_layedit_code'
                ,area: '550px'
                ,shade: 0.05
                ,shadeClose: true
                ,moveType: 1
                ,title: '插入代码'
                ,skin: 'layui-layer-msg'
                ,content: ['<ul class="layui-form layui-form-pane" style="margin: 15px;">'
                    ,'<li class="layui-form-item">'
                    ,'<label class="layui-form-label">请选择语言</label>'
                    ,'<div class="layui-input-block">'
                    ,'<select name="lang">'
                    ,'<option value="JavaScript">JavaScript</option>'
                    ,'<option value="HTML">HTML</option>'
                    ,'<option value="CSS">CSS</option>'
                    ,'<option value="Java">Java</option>'
                    ,'<option value="PHP">PHP</option>'
                    ,'<option value="C#">C#</option>'
                    ,'<option value="Python">Python</option>'
                    ,'<option value="Ruby">Ruby</option>'
                    ,'<option value="Go">Go</option>'
                    ,'</select>'
                    ,'</div>'
                    ,'</li>'
                    ,'<li class="layui-form-item layui-form-text">'
                    ,'<label class="layui-form-label">代码</label>'
                    ,'<div class="layui-input-block">'
                    ,'<textarea name="code" lay-verify="required" autofocus="true" class="layui-textarea" style="height: 200px;"></textarea>'
                    ,'</div>'
                    ,'</li>'
                    ,'<li class="layui-form-item" style="text-align: center;">'
                    ,'<button type="button" lay-submit lay-filter="layedit-code-yes" class="layui-btn"> 确定 </button>'
                    ,'<button style="margin-left: 20px;" type="button" class="layui-btn layui-btn-primary"> 取消 </button>'
                    ,'</li>'
                    ,'</ul>'].join('')
                ,success: function(layero, index){
                    var eventFilter = 'submit(layedit-code-yes)';
                    form.render('select');
                    layero.find('.layui-btn-primary').on('click', function(){
                        layer.close(index);
                        body.focus();
                    });
                    form.on(eventFilter, function(data){
                        layer.close(code.index);
                        callback && callback(data.field);
                    });
                }
            });
            code.index = index;
        }

        //全部工具
        ,tools = {
            html: '<i class="layui-icon layedit-tool-html" title="HTML源代码" lay-command="html" layedit-event="html">&#xe64b;</i><span class="layedit-tool-mid"></span>'
            ,strong: '<i class="layui-icon layedit-tool-b" title="加粗" lay-command="Bold" layedit-event="b"">&#xe62b;</i>'
            ,italic: '<i class="layui-icon layedit-tool-i" title="斜体" lay-command="italic" layedit-event="i"">&#xe644;</i>'
            ,underline: '<i class="layui-icon layedit-tool-u" title="下划线" lay-command="underline" layedit-event="u"">&#xe646;</i>'
            ,del: '<i class="layui-icon layedit-tool-d" title="删除线" lay-command="strikeThrough" layedit-event="d"">&#xe64f;</i>'

            ,'|': '<span class="layedit-tool-mid"></span>'

            ,left: '<i class="layui-icon layedit-tool-left" title="左对齐" lay-command="justifyLeft" layedit-event="left"">&#xe649;</i>'
            ,center: '<i class="layui-icon layedit-tool-center" title="居中对齐" lay-command="justifyCenter" layedit-event="center"">&#xe647;</i>'
            ,right: '<i class="layui-icon layedit-tool-right" title="右对齐" lay-command="justifyRight" layedit-event="right"">&#xe648;</i>'
            ,link: '<i class="layui-icon layedit-tool-link" title="插入链接" layedit-event="link"">&#xe64c;</i>'
            ,unlink: '<i class="layui-icon layedit-tool-unlink layui-disabled" title="清除链接" lay-command="unlink" layedit-event="unlink"">&#xe64d;</i>'
            ,face: '<i class="layui-icon layedit-tool-face" title="表情" layedit-event="face"">&#xe650;</i>'
            ,image: '<i class="layui-icon layedit-tool-image" title="图片" layedit-event="image">&#xe64a;<input type="file" name="file"></i>'
            ,code: '<i class="layui-icon layedit-tool-code" title="插入代码" layedit-event="code">&#xe64e;</i>'

            ,help: '<i class="layui-icon layedit-tool-help" title="帮助" layedit-event="help">&#xe607;</i>'
        }

        ,edit = new Edit();

    exports(MOD_NAME, edit);
});